I have no idea why the report is so difficult to understand by myself. Perhaps it is the strange noma-clatured or translation.
I see no way to corroborate the causal factors relating to the engine from the english version report. The finding of molten splatter near the injectors of the flame tubes doesn't correlate as secondary to a HP turbine failure.
The lack of comparative descriptrion with the right engine also leaves one guessing about it's actual ability to produce power.
Are the investigators suggesting that the power was purposedly reduced on this engine after the left engine had failed on its own, Or are we to assume that the engine was overboosted and lost power due to overheat effects?